北斗系统星源伪距偏差特性分析及改正

doi:10.13474/j.cnki.11-2246.2019.0069

测绘通报 ›› 2019, Vol. 0 ›› Issue (3): 11-15,26.doi: 10.13474/j.cnki.11-2246.2019.0069

北斗系统星源伪距偏差特性分析及改正

朱少林, 岳东杰, 陈健, 汤同旭, 章媛

河海大学地球科学与工程学院, 江苏南京 211100

收稿日期:2018-05-09 出版日期:2019-03-25 发布日期:2019-04-02
作者简介:朱少林(1992-),男,博士生,主要从事GNSS导航与定位的研究。E-mail:zhushaolin_ch@163.com
基金资助:
江苏省产学研联合创新资金前瞻性研究项目（BY2015-002-04）

Characteristic analysis and correction of BeiDou satellite-induced code bias

ZHU Shaolin, YUE Dongjie, CHEN Jian, TANG Tongxu, ZHANG Yuan

School of Earth Science and Engineering, Hohai University, Nanjing 211100, China

Received:2018-05-09 Online:2019-03-25 Published:2019-04-02

摘要/Abstract

摘要： 北斗卫星伪距观测值存在一类与卫星相关的系统误差，称为星源伪距偏差，MEO和IGSO卫星可以通过其与高度角的关系建立改正模型，而GEO卫星由于其静止特性难以建立基于高度角的改正模型。据此，本文在分析GEO卫星伪距偏差特性的基础上，提出了一种基于奇异谱分析（SSA）的修正方法，并通过双频无电离层组合伪距单点定位（SPP）对比试验来验证修正效果。结果表明：修正后GEO卫星伪距观测值基本上消除了伪距偏差，MP观测值精度在B1、B2、B3频率上分别提高了39.9%、17.9%、29.4%，MW观测值精度提高了41.3%；传统改正模型修正IGSO和MEO卫星伪距偏差对SPP影响很小，而奇异谱分析方法修正GEO卫星伪距偏差使SPP的精度在平面、高程方向上分别提高了11.1%、21.1%。

关键词: 北斗系统, 星源伪距偏差, 奇异谱分析, MP组合, MW组合, 双频SPP

Abstract: There are systematic errors on BeiDou code pseudorange measurements because of the influence of satellite-induced errors which are called satellite-induced biases.The IGSO and MEO satellites can establish the correction model by the relationship between code bias and elevation,but the GEO satellite is difficult to establish the correction model because of the small change of elevation.In this contribution,with the analysis of characteristics of GEO satellite-inducedcode bias,a method of correcting is proposed based on singular spectrum ananlysis (SSA),and the correction effect is verified by the experiment of single point positioning (SPP) of ionosphere-free combination.The results show that after correction,the accuracy of GEO MP observation improves 39.9%,17.9% and 29.4% respectively in N,E and U,and the MW observation improves 41.3%.Correcting IGSO and MEO code bias with the traditional correction model has little influence on SPP,while correcting GEO and IGSO pseudo range errors with the singular spectrum analysis method improves the accuracy of SPP by 11.1% and 21.1% respectively in the plane and elevation direction.

Key words: BeiDou system, code pseudorange bias, singular spectrum ananlysis, MP combination, MW combination, dual-frequency single point positioning

中图分类号:

P228

朱少林, 岳东杰, 陈健, 汤同旭, 章媛. 北斗系统星源伪距偏差特性分析及改正[J]. 测绘通报, 2019, 0(3): 11-15,26.

ZHU Shaolin, YUE Dongjie, CHEN Jian, TANG Tongxu, ZHANG Yuan. Characteristic analysis and correction of BeiDou satellite-induced code bias[J]. 测绘通报, 2019, 0(3): 11-15,26.

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北斗系统星源伪距偏差特性分析及改正

Characteristic analysis and correction of BeiDou satellite-induced code bias

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